Examples with AlterDatabaseMessage org.apache.hadoop.hive.metastore.messaging.AlterDatabaseMessage used on opensource projects

Example 1 with AlterDatabaseMessage

use of org.apache.hadoop.hive.metastore.messaging.AlterDatabaseMessage in project hive by apache.

the class AlterDatabaseHandler method handle.

@Override
public List<Task<? extends Serializable>> handle(Context context) throws SemanticException {
    if (!context.isTableNameEmpty()) {
        throw new SemanticException("Alter Database are not supported for table-level replication");
    }
    AlterDatabaseMessage msg = deserializer.getAlterDatabaseMessage(context.dmd.getPayload());
    String actualDbName = context.isDbNameEmpty() ? msg.getDB() : context.dbName;
    try {
        Database oldDb = msg.getDbObjBefore();
        Database newDb = msg.getDbObjAfter();
        AlterDatabaseDesc alterDbDesc;
        if ((oldDb.getOwnerType() == newDb.getOwnerType()) && oldDb.getOwnerName().equalsIgnoreCase(newDb.getOwnerName())) {
            // If owner information is unchanged, then DB properties would've changed
            Map<String, String> newDbProps = new HashMap<>();
            Map<String, String> dbProps = newDb.getParameters();
            for (Map.Entry<String, String> entry : dbProps.entrySet()) {
                String key = entry.getKey();
                // Ignore the keys which are local to source warehouse
                if (key.startsWith(Utils.BOOTSTRAP_DUMP_STATE_KEY_PREFIX) || key.equals(ReplicationSpec.KEY.CURR_STATE_ID.toString())) {
                    continue;
                }
                newDbProps.put(key, entry.getValue());
            }
            alterDbDesc = new AlterDatabaseDesc(actualDbName, newDbProps, context.eventOnlyReplicationSpec());
        } else {
            alterDbDesc = new AlterDatabaseDesc(actualDbName, new PrincipalDesc(newDb.getOwnerName(), newDb.getOwnerType()), context.eventOnlyReplicationSpec());
        }
        Task<DDLWork> alterDbTask = TaskFactory.get(new DDLWork(readEntitySet, writeEntitySet, alterDbDesc));
        context.log.debug("Added alter database task : {}:{}", alterDbTask.getId(), actualDbName);
        // Only database object is updated
        updatedMetadata.set(context.dmd.getEventTo().toString(), actualDbName, null, null);
        return Collections.singletonList(alterDbTask);
    } catch (Exception e) {
        throw (e instanceof SemanticException) ? (SemanticException) e : new SemanticException("Error reading message members", e);
    }
}